Acute gastritis refers to the acute onset of gastric mucosa damage or erosion, commonly caused by drugs or stress-induced injuries, including those caused by alcohol. For treatment, proton pump inhibitors that suppress stomach acid can be used. Aside from proton pump inhibitors, H2 receptor antagonists can also be chosen, but the therapeutic effect of H2 receptor antagonists is not as good as proton pump inhibitors. Treatment should also include gastric mucosal protectants and drugs that promote mucosal repair. Additionally, if gastrointestinal motility is poor, prokinetic agents may be added to the treatment. Moreover, during the acute phase, it is best to consume liquid foods and drink porridge.